package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;
import org.yaml.snakeyaml.events.Event;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * 菜品管理
 */
@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {
    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 新增菜品
     *
     * @param dishDto
     * @return
     */
    @CacheEvict(value = "dishcache", allEntries = true)
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());

        dishService.saveWithFlavor(dishDto);

        return R.success("新增菜品成功");
    }

    /**
     * 菜品信息分页查询
     *
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {
        //构造分页构造器对象
        Page<Dish> pageInfo = new Page<>(page, pageSize);
        Page<DishDto> dishDtoPage = new Page<>();

        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name != null, Dish::getName, name);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);

        //执行分页查询
        dishService.page(pageInfo, queryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(pageInfo, dishDtoPage, "records");
        List<Dish> records = pageInfo.getRecords();
        List<DishDto> list = records.stream().map((item) -> {

            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item, dishDto);
            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            return dishDto;
        }).collect(Collectors.toList());
        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }

    /**
     * 根据id查询   修改时回显
     *
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id) {
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }

    /**
     * 修改菜品
     *
     * @param dishDto
     * @return
     */
    @CacheEvict(value = "dishcache", allEntries = true)
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());
        dishService.updateWithFlavor(dishDto);
        return R.success("修改菜品成功");
    }
    /**
     * 批量删除  删除dish表id dishflavor表dishId    (如果菜品启售则不能删除,只能删除停售状态的菜品???)
     * @param ids
     * @return
     */
    @DeleteMapping
    @CacheEvict(value = "dishCache",allEntries = true) //清除setmealCache名称下,所有的缓存数据
    public R<String> deleteDish(@RequestParam List<Long> ids){

        for (Long id : ids) {
            LambdaQueryWrapper<DishFlavor> lqw = new LambdaQueryWrapper<>();
            lqw.eq(DishFlavor::getDishId,id);
            dishFlavorService.remove(lqw);
        }

        dishService.removeByIds(ids);

        //清理所有菜品的缓存数据
        Set keys = redisTemplate.keys("dish_*"); //获取所有以dish_xxx开头的key
        redisTemplate.delete(keys); //删除这些key

        return R.success("删除成功");
    }
    /**
     * 根据条件查询菜品
     *
     * @param dish
     * @return
     */
    /*@GetMapping("/list")
    public R<List<Dish>> list(Dish dish){
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId()!=null ,Dish::getCategoryId ,dish.getCategoryId());
        queryWrapper.eq(Dish::getStatus,1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);
        return R.success(list);
    }*/
    @Cacheable(value = "dishcache", key = "#setmeal.categoryId+':'+#setmeal.status",condition = "#result!=null")
    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish) {
        //动态构造key
        String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus(); //dish_1290213048_1

        //从redis获取数据
        List<DishDto> dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);
        if (dishDtoList!=null){
            //如果存在直接返回
            return R.success(dishDtoList);
        }

        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        queryWrapper.eq(Dish::getStatus, 1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);

        // List<Dish>   ---> List<DishDto>
        dishDtoList = new ArrayList<>();
        for (Dish dish1 : list) {
            DishDto dishDto = new DishDto();
            //1.把dish的属性值copy给dishDto
            BeanUtils.copyProperties(dish1, dishDto);
            //2.查询菜品的口味数据
            // select * from dish_flavor where dish_id = ?
            LambdaUpdateWrapper<DishFlavor> qw1 = new LambdaUpdateWrapper<>();
            qw1.eq(DishFlavor::getDishId, dish1.getId());
            List<DishFlavor> flavors = dishFlavorService.list(qw1);
            //3.将菜品的口味列表 set给 dishDto
            dishDto.setFlavors(flavors);
            //4.将dishDto放入到 dishDtos 集合中
            dishDtoList.add(dishDto);
        }
        //如果不存在需要查询数据库将查询到的缓存到redis

        redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);
        return R.success(dishDtoList);
    }
}
